China heads into the new year with its factories back in contractionary territory as the threat of a prolonged trade war dampens sentiment and stimulus struggles to gain traction.

The manufacturing purchasing managers index dropped to 49.4 in December, the weakest since early 2016 and below the 50 level that denotes contraction. Measures of new orders and new export orders slipped — a bearish signal for future demand — while readings for input and output prices weakened.

“The slowdown will continue into the next year,” said Larry Hu, a Hong Kong-based economist at Macquarie Securities Ltd. “The weak PMI could result in more government stimulus to shore up the economy.”

There was some good news as the non-manufacturing PMI rose to 53.8 from 53.4. That suggests recent stimulus efforts may already be starting to have some effect.

“Services is increasingly a bigger part of the economy, so that holding up is a counter to the weaker manufacturing, but to maintain the pace of growth, more stimulus will be needed,” said Patrick Bennett, head of macro strategy for Asia at Canadian Imperial Bank of Commerce in Hong Kong.

Much now rides on trade. The U.S. agreed to postpone a tariff hike on $200 billion of imports from China until March 1 as both sides try to strike a deal over issues such as the alleged theft of intellectual property and technology, trade barriers, and the trade deficit.

President Donald Trump reported “big progress” in trade talks with his Chinese counterpart Xi Jinping, providing an optimistic start to what could be a make-or-break year for ties between the world’s largest economies. The two presidents spoke at length by telephone Saturday, with each expressing satisfaction with trade talks initiated after their meeting earlier this month in Argentina.

Zhou Hao, an economist with Commerzbank AG in Singapore, said corporate sentiment in China has been hit hard by the trade war, which is one reason officials in Beijing are pushing for a deal.

“It is very difficult to lay out long term projects at this moment,” he said.

The weak PMI result was foreshadowed by Bloomberg’s reading of early indicators for December and comes after official data showed the slowdown deepening in November, with industrial production growth the weakest in a decade and industrial profits falling for the first time in almost three years.

Ding Shuang, Greater China and North Asia chief economist at Standard Chartered Plc, noted the weak export orders suggest deteriorating external demand, which will likely prompt additional policy support from authorities, mostly on the fiscal side. Recent steps taken to support growth will start to gain traction soon, he said.

“The first quarter next year could be the low point as growth bottoms out,” he said.

More government support, including looser monetary policy, more cuts in taxes and fees, and investment to upgrade manufacturing, are expected in 2019, according to the top government planning meeting this month.